import axios from "axios";
import {Loading, Message} from "element-ui";
import userStore from "@/store/modules/user";
import configStore from "@/store/modules/config";
import {blobValidate, tansParams} from "@/utils/index";
import cache from "@/plugins/cache";
import {saveAs} from "file-saver";
import i18n from "@plugins/i18n";

let downloadLoadingInstance;
// 是否显示重新登录
export let isReLogin = {show: false};

axios.defaults.headers["Content-Type"] = "application/json;charset=utf-8";
// 创建axios实例
const service = axios.create({
    // axios中请求配置有baseURL选项，表示请求URL公共部分
    baseURL: process.env.VUE_APP_BASE_API, // 超时
    timeout: 10000
});

// request拦截器
service.interceptors.request.use(config => {
    // 是否需要防止数据重复提交
    const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;
    const token = userStore.state.token;
    if (token) config.headers["token"] = token; // 让每个请求携带自定义token 请根据实际情况自行修改
    config.headers["Rn"] = configStore.state.rn;
    config.headers["Identity-Id"] = configStore.state.identityId;
    // get请求映射params参数
    if (config.method === "get" && config.params) {
        let url = config.url + "?" + tansParams(config.params);
        url = url.slice(0, -1);
        config.params = {};
        config.url = url;
    } else if (config.method !== "get" && config.params) {
        config.headers["Content-Type"] = "application/x-www-form-urlencoded";
        config.data = tansParams(config.params);
        config.params = {};
    }
    if (!isRepeatSubmit && (config.method === "post" || config.method === "put")) {
        const requestObj = {
            url: config.url,
            data: typeof config.data === "object" ? JSON.stringify(config.data) : config.data,
            time: new Date().getTime()
        };
        const requestSize = Object.keys(JSON.stringify(requestObj)).length; // 请求数据大小
        const limitSize = 5 * 1024 * 1024; // 限制存放数据5M
        if (requestSize >= limitSize) {
            return config;
        }
        const sessionObj = cache.session.getJSON("sessionObj");
        if (sessionObj === undefined || sessionObj === null || sessionObj === "") {
            cache.session.setJSON("sessionObj", requestObj);
        } else {
            const s_url = sessionObj.url; // 请求地址
            const s_data = sessionObj.data; // 请求数据
            const s_time = sessionObj.time; // 请求时间
            const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
            if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
                const message = i18n.t("api.error.isRepeatSubmit");
                return Promise.reject(new Error(message));
            } else {
                cache.session.setJSON("sessionObj", requestObj);
            }
        }
    }
    return config;
}, error => {
    Promise.reject(error);
});

// 响应拦截器
service.interceptors.response.use(res => {
    const body = res.data;
    // console.log('---- start:' + res.config.url + ' ------')
    // console.log('data:', res.config.data, " params", res.config.params)
    // console.log('response:', res.data);
    // console.log('---- end:' + res.config.url + ' ------')
    // console.log('   ')
    // console.log('   ')
    // console.log('   ')
    body.data = JSON.parse(atob(body.data));
    // 未设置状态码则默认成功状态
    const code = body.code || 200;
    // 获取错误信息
    const msg = body.msg || "访问数据接口出错,请稍后重试";
    if (code === 999) {
        location.href = "/login";
        return;
    }
    // 二进制数据则直接返回
    if (res.request.responseType === "blob" || res.request.responseType === "arraybuffer") {
        return body;
    }
    // if (code === 401) {
    //     if (!isReLogin.show) {
    //         isReLogin.show = true;
    //         MessageBox.confirm("您当前登录状态已过期，是否重新登录？", "提示", {
    //             confirmButtonText: "重新登录", cancelButtonText: "取消", type: "warning"
    //         })
    //             .then(() => {
    //                 isReLogin.show = false;
    //                 store.dispatch("FedLogOut").then(() => {
    //                     location.href = "/login";
    //                 });
    //             })
    //             .catch(() => {
    //                 isReLogin.show = false;
    //                 store.dispatch("FedLogOut");
    //             });
    //     }
    //     return Promise.reject("无效的会话，或者会话已过期，请重新登录。");
    // } else
    if (code === 401) {
        if (!res.config.notErrorMsg) {
            Message({message: msg, type: "error", center: true});
        }
    } else {
        return body;
    }
    return Promise.reject(body);
}, error => {
    let {message} = error;
    if (message === "Network Error") {
        message = "网络连接失败";
    } else if (message.includes("timeout")) {
        message = "请求超时,请稍后重试";
    } else if (message.includes("Request failed with status code")) {
        message = "数据接口访问失败, 错误代码:" + message.substr(message.length - 3);
    }
    Message({message: message, type: "error", duration: 5 * 1000});
    return Promise.reject(error);
});

// 通用下载方法
export function download(url, params, filename, config) {
    downloadLoadingInstance = Loading.service({
        text: "正在下载数据，请稍候", spinner: "el-icon-loading", background: "rgba(0, 0, 0, 0.7)"
    });
    return service
        .post(url, params, {
            transformRequest: [params => {
                return tansParams(params);
            }], headers: {"Content-Type": "application/x-www-form-urlencoded"}, responseType: "blob", ...config
        })
        .then(async data => {
            const isBlob = blobValidate(data);
            if (isBlob) {
                const blob = new Blob([data]);
                saveAs(blob, filename);
            } else {
                const resText = await data.text();
                const rspObj = JSON.parse(resText);
                const errMsg = rspObj.msg || "访问数据接口出错,请稍后重试";
                Message.error(errMsg);
            }
            downloadLoadingInstance.close();
        })
        .catch(r => {
            console.error(r);
            Message.error("下载文件出现错误，请联系运维人员!");
            downloadLoadingInstance.close();
        });
}

export default service;
